From: Zach Brown <zach.brown@oracle.com>
To: Jeff Moyer <jmoyer@redhat.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>,
linux-kernel@vger.kernel.org, linux-aio@kvack.org,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [RFC][PATCH] Fix lock inversion aio_kick_handler()
Date: Thu, 09 Nov 2006 14:51:59 -0800 [thread overview]
Message-ID: <4553B10F.1020505@oracle.com> (raw)
In-Reply-To: <x49velokztg.fsf@segfault.boston.devel.redhat.com>
> Zach> > Doh. Unfortunately, this patch isn't entirely correct as it
> Zach> could race with > __put_ioctx() which sets ioctx->mm = NULL.
>
> Zach> Aha, yeah, that's what I was missing. Thanks.
>
> Zach> > Something like the following should do the trick:
>
> Zach> Cool, I'll respin and send it out.
>
> Did you ever resend this patch, Zach?
Sadly, no. I vaguely remember thinking that the refcounting was pretty
messed up in these paths and that more than just this patch was needed.
I don't remember the details.
Maybe I should take a look again :/.
> current kernels. I'm still running into the lockdep warnings.
When doing what? Working with that IO_CMD_EPOLL_WAIT patch?
- z
next prev parent reply other threads:[~2006-11-09 22:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-29 0:10 [RFC][PATCH] Fix lock inversion aio_kick_handler() Zach Brown
2006-07-29 1:34 ` Benjamin LaHaise
2006-07-29 2:02 ` Zach Brown
2006-11-09 22:41 ` Jeff Moyer
2006-11-09 22:51 ` Zach Brown [this message]
2006-11-09 22:57 ` Jeff Moyer
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